It acts by interfering with the signal transmission between vestibular apparatus of the inner ear and the vomiting centre of the hypothalamus. The
disparity of signal processing between inner ear motion receptors and
the visual senses is abolished, so that the confusion of brain
whether the individual is moving or standing is reduced. Vomiting
in motion sickness is actually a physiological compensatory
mechanism of the brain to keep
the individual from moving so that it can adjust to the signal
perception.

Cinnarizine could be also viewed as a nootropic drug because of its vasorelaxating
abilities (due to calcium channel blockage), which happen mostly in
brain. It is also effectively combined with other nootropics,
primarily Piracetam; in
such combination each drug potentiate the other in boosting brain
oxygen supply.

Cinnarizine can cause drowsiness and blurred vision. It is
important that users make sure their reactions are normal before
driving, operating machinery, or doing any other jobs which could
be dangerous if they are not fully alert or able to see well.